Darwin’s Theory of Evolution Ideas that Shaped Darwin’s Thinking Chapter 15-2 Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006

Ideas that shaped Darwin’s thinking: In 1785 ______________ proposes that the EARTH was _______ by _________________ occurring over __________ periods of time, and is _______________ old. very long James Hutton shaped geological forces millions of years

Ideas that shaped Darwin’s thinking: In 1833 ___________ explains that the geological Processes, still ___________, have shaped Earth’s features over ________________ Charles Lyell occurring now long periods of time

Ideas that shaped Darwin’s thinking: SINCE THEN Theory of Pangaea …and continental drift

Ideas that shaped Darwin’s thinking: _____________________ He observed that babies were being born faster than people were dying. He reasoned that if the human population continued to grow, sooner or later there would be _______________________ Thomas Malthus (1798) insufficient space & food

Living things must compete for food, shelter, space, mates competition

Ideas that shaped Darwin’s thinking: ___________________________ was one of first scientists to recognize living things _______________ and that all species have ________ from other species. Lamarck published his hypothesis of ________________________ the year Darwin was born. changed over time Jean-Baptiste Lamarck (1809) descended Inheritance of Acquired traits

The male fiddler crab uses its front claw to _________mates and fight off _____________. Through _________ use, the front claw becomes ________. The fiddler passes on this __________ characteristic to its offspring attract predators larger repeated acquired Inheritance of acquired traits

What’s wrong with Lamarck’s hypothesis? Lamarck didn’t know about genes and how traits are _______. If you lifted weights your whole young adult life, and then you had children, would your kids be more muscular? inherited NO! ________ traits can ____ be __________ to their offspring. ACQUIRED NOT PASSED ON

What’s right with Lamarck’s hypothesis? Lamarck was first to develop a scientific hypothesis about _______ and recognize that organisms are ________________________ evolution adapted to their environments

a.The earth is really old, and slowly changes b.Living things pass acquired changes on to their offspring c.Sooner or later growing populations run out of resources d.Living things change slowly over time because of competition for resources, and pass those changes on to their offspring Hutton Lyell Malthus Lamarck Match the letter of the idea with the man or men who proposed it:

a.The earth is really old, and slowly changes b.Living things pass acquired changes on to their offspring c.Sooner or later growing populations run out of resources d.Living things change slowly over time because of competition for resources, and pass those changes on to their offspring Hutton Lyell Malthus Lamarck a. c. b. d.